Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a85a7a4ad9cb9d8…

MALICIOUS

PDF

35.5 KB Created: 2020-11-08 00:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5a4ae7b9cca16ffe88357996e0086590 SHA-1: ff21a466d58b7e0e1e2455add7eff4bb5c500ea5 SHA-256: 1a85a7a4ad9cb9d87598a4d85929a04fd313964b53f052e932084361632d40dc
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/123?keyword=geometry+dash+coolmath4kids PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5f8fca82ec112.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/d07c425542415c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_5f915dc24ccf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5f96c7ca4ebb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428341/normal_5f9bbcf25fdd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385620/normal_5f93c965883de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8904383d258.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zalomi/19350236322.pdfIn PDF document text
    • https://wazewezobe.files.wordpress.com/2020/11/kavuz.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/jedadowuru.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/22229535402.pdfIn PDF document text
    • https://dugifene.files.wordpress.com/2020/11/masajes_erotizantes.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/how_to_quote_poems_in_an_essay_mla.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/pozetuzenuwovirumi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C16 5464 bytes
SHA-256: d6dc11d29bfa5ccfdc504d02ed2f7bb820de4a6b32164716a94589124ffa9333
font_01_sfnt_off00005e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8F 10212 bytes
SHA-256: 88853e28edb85e6ddcc0505b25ff635417a01b017b9fc32ade42ebbc6a56910a